Electrical device comprising a conductive polymer composition
US5451919A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1993 |
| Grant date | Sep 19, 1995 |
| Priority date | — |
| Expiry date | Jun 29, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B3/146
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A conductive polymer composition which has a resistivity of less than 10 ohm-cm and which exhibits PTC behavior comprises a polymeric component and a particulate conductive filler. The polymeric component comprises a first crystalline fluorinated polymer having a first melting point T.sub.m1 and a second crystalline fluorinated polymer having a second melting point T.sub.m2 which is from (T.sub.m1 +25).degree. C. to (T.sub.m1 +100).degree. C. The composition exhibits one of a number of characteristics, including a relatively high PTC anomaly. The composition is useful in circuit protection devices to be used at high ambient conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.